Anti-overheating device.



`1.H.H|`CKEY. ANTI-UVERHEATING DEVICE.

APPLICATION FILEI) DEC. I3. 1917.

Patented sept. 24,1918.

: I I l I .l I I I u l IA. r I Il II f I i I IIIIIIIIIIIIIIINIIIH" w\]NVENTIOR. I

ATTORNEY UNITED sTATns PATENT OFFICE.

JOHN II. HICKEYQ F SAN FRANCISCO, CALIFORNIA.

ANTI-OVERHEATING DEVICE.

`Specification of Letters Patent. Patentd Sept. 24;, 1918.

Application ined-December 18, 1911. Serial N0. 207,213. y

To all 'whom it may concern.'

Be itknown that I JOHN HICKEY, a

citizen of the United States, residing in the ci-tyand county of SanFrancisco and State of California, have invented a new anduseful-Improvement in l.Anti-overheating Dediscontinue the flow energy.

vices', of which the following -is a specification.

VMy invention relates to improvements in anti-overheating deviceswherein `the melting of the device automatically operates to of the heatproducing The presentinvention has for its object the provision of aVcontrolling element for 4heatin" `units in which lthe said element ismclte by .apredetermined degree of heat' b lown -or meltedlby a suddensurge of electrical current or a sudden increase of amradiated from theunit, to automatically and permanently discontinue the operation of theheat producing energy.

While the broad principle involved may be utilized in various ways anddevices I have illustrated the same as usedin connection with anelectrical heating coil such as is commonly used in flat irons. Thedevice should in no way be confounded with an ordinary electrical `fusewhere said fuse is per-age;V When used in connection with electricalheating units the controlling e1ement or fusible connection has a farater capacity or conductivity vthan the leting .co1l,sa1d heating coilbeing properly protected against excessive amperage by proper" fusesinstalled in the electrical wirin of the establishment' or trical coilis use .Therefore the fusible 4controlling element., can only be: meltedlby an excessive degree of heat radiated from thelheatin 'coil' or :fromthe device .within which the4 eatin coil is installed. As the controlin' element is detachable it maybe easily rep aced by a new element whenthe old one has been melted.

I accompilish these several obectsI by means'ofone' form which I have ilustrated .reference are used to desi inthe 'drawings forming a. artofthe present specication wherein 11 echaracters of i gnate similararts' throughout the said speclfication and rawin andmin whichlgur'el isa plan view of an electrical iron4 disclosing my invention `appliedtheretm',v .'f

plant in which said elecdisclose the connection; and

Fig. '5 is a longitudinal sectional view of eferrin to the drawings thenumeral l' is used to y ing the usual eating coil 2 therein. `One end 3of the coil 2 is connected in the usual manner` to one terminal 4 whilethe; opposite end 5 of the coil '2 is connected by means 'of aconnection 6,` having a gap 7 therein,

to the other` or remaining terminal 8 of the iron.1. 'h

The iron 1 is provided'with Aa housin *9 having an aperture 10 in theupper sur ace thereof and arranged directly over the gap 7 in theconnection 6;

A fusible ,controlling element or conneces1 nate an electrical. ironhavtion 11 is embedded within an insulating block 12 providedwithsuitable screws `or `contacts 14 between which the `fusibleconnection or controlling clement 11 is connected. '1 i The block 12 isplaced within the aperture'l() of the housin l* 9 so that the contacts14 rest upon the en s of the' connection 6 adjacent thegap 7 therein,thereby lacin the connection 11 in series with the eatin coils 2 of the.iron 1.

The contacts 14 and connection 11 are nominally held in series with saidcoils 2 `by 1 means of a spring-latch 16 pivotally mounted. as at 17near the aperture 10 within thp housi 9. J

Thgace of the block 12 on the side which Vcontains theconnection 11 iscovered with any suitable transparent insulating material 11 4such asmica or the like. f

In operation,` the 'fuse or connection 11 is of greate'rconductivitythan the` coll 2 so that any s uddenlsurge of electrical/ current c caable of being carried by the .said coils 2,

w' l not blowl or tion: 11. H

' Just ,before the heat radiated by the coils melt said fuse or connec-2 is of sulicient degree to ropagate a flame the connection 11 1s melteand the flow of current through thecpils 2 is permanently vcoil to oneof thev terminals of interrupted thereby automatically*preventing thefurther production of heat by" said coils 2. l

Any melted particles of the connection liy will be retained Within theblock l2 by the insulated covering 1l thereon and whenA the latch 1Gis`inoved away from the aperture 10 Within the lioilsing t) the meltedConnection 1l and block 12 may be removed and' a new block andconnection of similar construction placed in series with the coil 2 byinserting' saine in said aperture- 10 and replacing the sp/ring latch 1Gto normally retain said nen1 connection 1l in Contact, and thereby inseries with the coil 2.

It is obvious from the foregoing that I have provided improved means forautomatically preventing the overheating of heating coils. i

Having thus described my invention what I Claim as new and desire tosecure by Letters Patent is` l. The combination with an electrical ironand heating coil therefor of a housing having an aperture` Within theuppe surface thereof; a connection from one end ofthe the ironv andhaving a gap therein arranged beneath the aperture within the housing;and an insulated detachable fusible 'connection arranged within' theaperture to bridgethe gap in the first mentioned connection and adf ptedto be melted at a [undetermined degree of heat radiated from the coilwherevby the operation of said coil may be discon` tinued. y

2. The combination with an electrical iron vinally retai n the A'andheating coil 'therefor of a ,housing havmentioned connection.

be' discontinued; and

the fusible connection in series with the coil and. first terminals oftheiron andv 1 3. The combination `with an electrical iroiiand heatingcoil therefor of a housing hai-'l ing an aperture within the uppersurface:l

thereof; a connect coil to one of the terminals of the iron and.

ion from one end ofthe.

having a gap therein arranged beneatlitlie,...

aperture within the housing;

and an insuT lated detachablev fusible within the aperture to bridge thegap inthe first mentioned lconnectionand adapted to be melted at apredetermined degree vof heilt l coil whereby tlie operaia; 5

radiated from the tion of said coil may be discontinued; Aandai suitablehitch pivotally mounted ,upon` the housing, near'the aperture therein tonorries with the coil nection.

In. witness whereof I hereunto set my signature. i

and first mentioned Corev fusible connection in.s.e-`

Jon N n'. incitan f

